5 results about "Matrix method" patented technology

The present application relates to the technical field of power system operation analysis and regulation, and specifically discloses a kind of VSC-HVDC system power flow regulation capability evaluation method, comprising the following steps: S1, the power flow regulation range mathematical model of establishing containing back-to-back flexible HVDC transmission system BTB;S2, establish new energy output uncertainty model;S3, construct power flow over-limit risk and risk adaptive power regulation mechanism;S4, generalized polynomial chaos matrix method is used to evaluate the two-way power flow regulation range;S5, output power flow regulation range evaluation results and visual index.The present application uses the above-mentioned VSC-HVDC system power flow regulation capability evaluation method, realizes the collaborative quantification of new energy randomness, operation risk and BTB regulation capacity, improves the accuracy and engineering practicability of the evaluation results, and provides a decision basis for power system planning and design, operation control.

A kind of multi-stage planetary gear transmission design method based on hypergraph expression, comprising: establishing the function component identification rule and hypergraph mapping rule of planetary gear transmission mechanism;Establish the kinematic relationship diagram of planetary gear transmission mechanism;Simplify the hypergraph;Establish the combined hypergraph model of multi-stage planetary gear transmission mechanism;Convert the hypergraph model into the corresponding adjacency matrix;Establish the kinematic topological model of multi-stage planetary gear transmission mechanism, and construct the corresponding transmission ratio matrix;Generate the configuration of multi-stage planetary gear transmission mechanism, and generate the corresponding multi-stage planetary gear transmission mechanism configuration scheme;Identify and remove duplicate isomorphic configuration by using Hamming matrix method for isomorphism discrimination;Verify the effectiveness of isomorphism discrimination result, and obtain the effective multi-stage planetary gear transmission mechanism configuration scheme satisfying the constraint condition.The present application can improve the configuration design efficiency and structure analysis capability of complex multi-stage planetary gear transmission mechanism.

The application discloses a kind of based on finite difference reduction multibody system transfer matrix method of rotating beam system dynamic characteristic analysis method and system.Method includes: the physical parameter model of rotating beam system is established, and the structural parameter of rotating beam is acquired;Rotating beam system dynamics control differential equation is established;Rotating beam system is discretized using finite difference method;The transfer matrix of the discretized multibody system model is constructed, and the transfer matrix is processed using reduction equation, and the reduced difference point reduction transfer matrix recursive relationship is obtained;The reduced state vector recursive equation is established, and the dynamic characteristic parameter of rotating beam system is calculated and output.The application is combined with finite difference method by multibody system transfer matrix method, and rotating beam element is discretized difference, and the differential term of rotating beam differential equation is differentially approximated to deduce transfer matrix, retains the characteristics of low matrix order involved in transfer matrix method, reduces the calculation scale, improves the success rate of numerical calculation result, and can effectively solve rotating beam and other dynamics problems.

The application discloses a kind of shipboard aircraft dynamics fast calculation method.Method includes following process: establishing shipboard aircraft catapult take-off multi-flexible body system dynamics model, establishes shipboard aircraft catapult take-off multi-flexible body system topology, utilize finite element method to establish main tire refinement finite element model, then tire flexible body dynamics characteristic parameter is exported and deduces the dynamics equation of tire flexible element, based on multi-body system transfer matrix method (MSTMM) and finite element modal synthesis method deduce shipboard aircraft catapult take-off multi-flexible body system total transfer equation and total transfer matrix, solve the inherent frequency of shipboard aircraft multi-flexible body system considering inflatable flexible tire and the dynamic response of catapult take-off;The method proposed in the application overcomes the defects of high matrix order and large amount of calculation of traditional methods when dealing with complex coupling system of shipboard aircraft containing inflatable flexible tire, has the advantages of fast calculation speed, high degree of programming and strong universality, provides an efficient calculation method for the dynamic analysis of complex shipboard aircraft multi-flexible body system.

The application discloses a kind of deep submicron device working condition failure mechanism proportion calculation method based on matrix method, comprising the following steps: step one: determine the kind of failure mechanism existing in the deep submicron device to be measured, establish the acceleration model of each failure mechanism;Step two: calculate acceleration factor matrix AF;Step three: calculate relative acceleration factor vector B according to the acceleration test data;Step four: construct failure mechanism proportion solving equation set;Step five: solve the value range of relative factor RF;Step six: determine the proportion of four kinds of failure mechanisms under the working condition of the deep submicron device to be measured;Through the above steps, the contribution proportion of the failure mechanism existing in deep submicron device under any working condition to device degradation can be calculated in combination with acceleration test data.